Borrallo is already reportedly helping the royal family as they prepare to travel to Australia and New Zealand next month. She will help care for the 8-month-old as the Duchess of Cambridge goes through her 30 planned dress changes.

After the announcement, the palace rep stated, "We will not be giving further details on Maria or her employment, except to say that the Duke and Duchess are of course delighted she has chosen to join them."

Borrallo will replace Jessie Webb, the nanny who once helped raise Princes William and Harry, and came out of retirement to assist the Duke and Duchess of Cambridge with Prince George after he was born on July 22.

Many suspected that Borrallo would be taking over the position full-time after she was spotted out for a stroll with Prince George in Kensington Gardens recently. Borrollo, who is in her 30s, is of Spanish descent, but has lived in the U.K. for over two decades.